mirror of https://github.com/opencardev/aasdk
137 lines
3.7 KiB
C++
137 lines
3.7 KiB
C++
/*
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* This file is part of aasdk library project.
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* Copyright (C) 2018 f1x.studio (Michal Szwaj)
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*
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* aasdk is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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* aasdk is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with aasdk. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <aasdk/USB/ConnectedAccessoriesEnumerator.hpp>
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namespace aasdk
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{
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namespace usb
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{
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ConnectedAccessoriesEnumerator::ConnectedAccessoriesEnumerator(IUSBWrapper& usbWrapper, boost::asio::io_service& ioService, IAccessoryModeQueryChainFactory& queryChainFactory)
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: usbWrapper_(usbWrapper)
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, strand_(ioService)
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, queryChainFactory_(queryChainFactory)
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{
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}
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void ConnectedAccessoriesEnumerator::enumerate(Promise::Pointer promise)
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{
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strand_.dispatch([this, self = this->shared_from_this(), promise = std::move(promise)]() mutable {
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if(promise_ != nullptr)
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{
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promise->reject(error::Error(error::ErrorCode::OPERATION_IN_PROGRESS));
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}
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else
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{
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promise_ = std::move(promise);
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auto result = usbWrapper_.getDeviceList(deviceListHandle_);
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if(result < 0)
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{
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promise_->reject(error::Error(error::ErrorCode::USB_LIST_DEVICES));
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}
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else if(deviceListHandle_->empty())
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{
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promise_->resolve(false);
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}
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else
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{
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actualDeviceIter_ = deviceListHandle_->begin();
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this->queryNextDevice();
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}
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}
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});
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}
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void ConnectedAccessoriesEnumerator::cancel()
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{
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strand_.dispatch([this, self = this->shared_from_this()]() mutable {
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if(queryChain_ != nullptr)
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{
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queryChain_->cancel();
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}
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});
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}
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void ConnectedAccessoriesEnumerator::queryNextDevice()
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{
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auto deviceHandle = this->getNextDeviceHandle();
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if(deviceHandle != nullptr)
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{
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queryChain_ = queryChainFactory_.create();
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auto queryChainPromise = IAccessoryModeQueryChain::Promise::defer(strand_);
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queryChainPromise->then([this, self = this->shared_from_this()](DeviceHandle) mutable {
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promise_->resolve(true);
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this->reset();
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},
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[this, self = this->shared_from_this()](const error::Error& e) mutable {
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if(e != error::ErrorCode::OPERATION_ABORTED)
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{
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this->queryNextDevice();
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}
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else
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{
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promise_->reject(e);
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this->reset();
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}
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});
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queryChain_->start(std::move(deviceHandle), std::move(queryChainPromise));
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}
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else if(actualDeviceIter_ == deviceListHandle_->end())
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{
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promise_->resolve(false);
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this->reset();
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}
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}
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DeviceHandle ConnectedAccessoriesEnumerator::getNextDeviceHandle()
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{
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DeviceHandle handle;
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while(actualDeviceIter_ != deviceListHandle_->end())
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{
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auto openResult = usbWrapper_.open(*actualDeviceIter_, handle);
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++actualDeviceIter_;
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if(openResult == 0)
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{
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break;
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}
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}
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return handle;
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}
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void ConnectedAccessoriesEnumerator::reset()
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{
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queryChain_.reset();
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deviceListHandle_.reset();
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actualDeviceIter_ = DeviceList::iterator();
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promise_.reset();
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}
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}
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}
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